The use of 10cc. syringes in high school chemistry experiments can reduce the expense of equipment and lead to imaginative experimental designs. Describes the equipment and experimental procedures for four experiments utilizing syringes. (JR)

Describes a unit of study of microorganisms employed with great success by over 100 teachers. The guide is a laboratory manual containing no prodedures or instructions. Only a brief problem statement is included. The student is the researcher and works out his own questions, procedures, results, and observations. (DF)

A science program was developed which is based on a mobile laboratory containing scientific experiments in biology, chemistry, physics, applied science, and mathematics. Discussion and experiments differ from the normal classroom setting as they utilize small groups and center around the relationship of modern science and technology of the urban…

Describes the operation principles, construction, and accessories of a land or survey gyrocompass. Indicates an agreement within O.1 degree in the direct comparison of the gyro-north with the astronomic north. (CC)

The function of filters in various situations is discovered through activities with common objects, machines, and organisms. (DF)

Describes a project-type undergraduate laboratory in electronics which utilizes integrated circuit operational amplifiers. Includes a brief account of ideal and nonideal operational amplifiers and a detailed description of the projects. (DF)